/*

    Copyright (C) 2016 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    A `GKComponent` that provides a `GKStateMachine` for entities to use in determining their actions.

*/

import SpriteKit

import GameplayKit

class IntelligenceComponent: GKComponent {

    // MARK: Properties

    let stateMachine: GKStateMachine

    let initialStateClass: AnyClass

    // MARK: Initializers

    init(states: [GKState]) {

        stateMachine = GKStateMachine(states: states)

        let firstState = states.first!

        initialStateClass = type(of: firstState)

        super.init()

    }

    required init?(coder aDecoder: NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

    // MARK: GKComponent Life Cycle

    override func update(deltaTime seconds: TimeInterval) {

        super.update(deltaTime: seconds)

        stateMachine.update(deltaTime: seconds)

    }

    // MARK: Actions

    func enterInitialState() {

        stateMachine.enter(initialStateClass)

    }

}